fly logs adds machine selection

Introduced 2026-07-22 · score 0.95

HOW TO USE IT

When debugging an app with multiple Machines, run `fly logs -m <machine-id>` to filter logs to one Machine, or `fly logs -s` to select one interactively. The command requires an authenticated Fly session and an app name.

WHY THIS HELPS

Narrow log inspection to one Machine while debugging an app with multiple Machines.

BEFORE THIS CHANGE

List Machines and copy a Machine ID before narrowing logs to one Machine.

REQUIREMENTS AND LIMITATIONS

• Version: v0.4.74
• -m, --machine <machine-id>: Filter logs by Machine ID. Alias: `--instance` / `-i`.
• -s, --select: Select a Machine from a list; cannot be used with `--machine`.
• Prerequisite: Requires an authenticated Fly session and an app name; the app can be determined from `fly.toml` or supplied with the app flag.
• The `-s` selection is interactive.
• The `--instance/-i` alias is hidden but still works.

FIRST-PARTY EVIDENCE

• https://github.com/superfly/flyctl/releases/tag/v0.4.74
• https://github.com/superfly/flyctl/pull/5018
• https://github.com/superfly/flyctl/blob/v0.4.74/internal/command/logs/logs.go

Check the installed version and the source before using it. Entry JSON

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